CN214572074U - Cooling water diversion system for straight cooling section of cooling wall of blast furnace - Google Patents

Abstract

The utility model relates to the field of blast furnace cooling equipment, in particular to a cooling water diversion system for a straight cooling section of a cooling wall of a blast furnace, which comprises a first pipeline and a second pipeline; the first pipeline is connected with the second pipeline through a branch pipeline; the first pipeline is connected to the water inlet pipeline of the cooling wall; and the second pipeline is connected to a water return pipeline of the degassing tank. The utility model discloses a blast furnace stave direct cooling section cooling water diversion system through the arrangement of diversion system, can reduce the cooling strength to the furnace waist of blast furnace and furnace belly to avoid too high cooling strength to make blast furnace waist, belly appear the problem that the thick easy drop of sediment skin knot, assurance molten iron quality that can be better to a certain extent.

Description

Cooling water diversion system for straight cooling section of cooling wall of blast furnace

Technical Field

The utility model relates to a blast furnace cooling device field is a blast furnace stave straight cold section cooling water diversion system particularly.

Background

With the promotion of long-life work of the blast furnace, the cooling wall of the large blast furnace is widely cooled by soft water in a closed and circulating manner, and the cooling effect of a hearth, a furnace belly and a furnace waist of the blast furnace is greatly improved.

However, in the design process of a large blast furnace, the phenomenon of overlarge flow rate of soft water closed circulation cooling water generally exceeds 15-20% of the design standard, particularly, the blast furnace using copper cooling walls at the lower part of a furnace belly, a furnace waist and a furnace body is common, because the cooling water flow rate is large, the cooling strength is high, the temperature difference of cooling water at the copper cooling wall section is extremely low, because the accuracy of a thermocouple for measuring the temperature of the cooling water is 0.05 ℃, the temperature difference of the water is often displayed to be 0 ℃, the overhigh cooling strength causes the thickness of a slag crust at the blast furnace belly and the blast furnace waist, the slag crust is not adjusted timely or fully, the operation furnace model is changed, the fuel ratio is increased, the furnace model is changed, the slag crust is frequently dropped off, the furnace cylinder thermal system is changed, the temperature is reduced in stages, the quality of molten iron is deteriorated, and abnormal furnace conditions can be caused by improper treatment.

Therefore, in order to solve the above problems, the conventional blast furnace stave cooling water system needs to be optimally designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art, provide a reposition of redundant personnel system that can connect at the straight cold section cooling water system of traditional blast furnace stave.

In order to realize the purpose, the utility model discloses a technical scheme be:

a cooling water diversion system for a straight cooling section of a cooling wall of a blast furnace comprises a first pipeline and a second pipeline; the first pipeline is connected with the second pipeline through a branch pipeline; the first pipeline is connected to the water inlet pipeline of the cooling wall; and the second pipeline is connected to a water return pipeline of the degassing tank.

A first gate valve is arranged on the first pipeline; a second gate valve is arranged on the second pipeline; and a pneumatic ball valve is also arranged on the second pipeline.

The branch pipeline comprises a plurality of single pipelines, and the single pipelines are distributed at intervals.

The first pipeline and the second pipeline are respectively connected with the end parts of the branch pipelines through connecting water bags; the end parts of the monomer pipelines are connected through a connecting water drum.

Each single pipeline is provided with a sealing butterfly valve, an electromagnetic flowmeter and a pressure reducing valve.

Each single pipeline is provided with two sealing butterfly valves, and the electromagnetic flow meter and the pressure reducing valve are arranged in the area between the two sealing butterfly valves.

The joints of the first pipeline and the cooling wall water inlet pipeline and the joints of the second pipeline and the degassing tank water return pipeline are welded on the inner side and the outer side.

The utility model has the advantages that:

the utility model discloses a blast furnace stave direct cooling section cooling water diversion system through arranging of cooling water diversion system, can reduce the cooling strength to the furnace waist of blast furnace and furnace belly to avoid too high cooling strength to make the problem that the thick easy droing of slag leather knot appears in blast furnace waist, belly, assurance blast furnace type that can be better to a certain extent, and then guarantee the molten iron quality.

Drawings

The contents of the various figures of the specification and the labels in the figures are briefly described as follows:

fig. 1 is a schematic structural diagram of the present invention during layout.

The labels in the above figures are:

1. a cooling wall water inlet pipeline 2, a degassing tank water return pipeline 3, a first pipeline 4, a second pipeline 5, a branch pipeline 6, a connecting water drum 7 and a pneumatic ball valve.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in further detail with reference to the accompanying drawings.

A blast furnace cooling wall straight cooling section cooling water diversion system comprises a first pipeline 3 and a second pipeline 4; the first pipeline 3 is connected with a second pipeline 4 through a branch pipeline 5; the first pipeline 3 is connected to the cooling wall water inlet pipeline 1; the second pipeline 4 is connected to the degassing tank water return pipeline 2; the utility model discloses a shunt system which is mainly a shunt pipeline, mainly comprising a pipeline structure of three parts, a first pipeline 3, a second pipeline 4 and a branch pipeline 5; the first pipeline 3 is connected with the cooling wall water inlet pipeline 1 for reducing the amount of cooling water entering the cooling wall so as to reduce the cooling strength, the second pipeline 4 is connected with the degassing tank water return pipeline 2 for playing a backflow role, the branch pipeline 5 is used for communicating the first pipeline 3 with the second pipeline 4, and meanwhile, the arrangement of the branch pipeline 5 can facilitate the control of the flow distribution flow by controlling the opening and the quantity of the branch pipeline 5 in the follow-up process; in other words, the utility model discloses a cooperation of first pipeline 3, second pipeline 4 and lateral conduit 5 can reduce the direct cold section cooling water flow of stave to can avoid the influence of too big cooling strength to the blast furnace.

Preferably, in the present invention, the first pipeline 3 is provided with a first gate valve 31; a second gate valve 41 is arranged on the second pipeline 4; the first gate valve 31 can be used for controlling the on-off of the first pipeline 3, the second gate valve 41 can be used for controlling the on-off of the second pipeline 4, the pneumatic ball valve 7 is further arranged on the second pipeline 4, the pneumatic ball valve 7 also plays a role in controlling the on-off of the second pipeline 4, meanwhile, the arrangement of the pneumatic ball valve 7 can also control the flow dividing system by subsequently matching a control system, and manual use is reduced.

Preferably, the branch pipe 5 of the present invention includes a plurality of single pipes 51, and each single pipe 51 is distributed at intervals; set up a plurality of monomer pipelines 51, can conveniently be to the control of reposition of redundant personnel flow, interval distribution between each monomer pipeline 51, be interval parallel distribution between monomer pipeline 51 when actually arranging, such distribution mode conveniently arranges, has avoided arranging between the pipeline to interfere the problem.

Preferably, the first pipeline 3 and the second pipeline 4 are respectively connected with the end parts of the branch pipelines 5 through connecting water drums 6; the ends of the monomer pipelines 51 are connected through a connecting water drum 6; the connecting water drum 6 is arranged, the basic function is used for storing the split cooling water, the connecting water drum 6 also has the buffering function, the transverse area of the connecting water drum 6 is large, and when the cooling water enters the connecting water drum 6, the flow speed of the split cooling water can be reduced; the whole shunting system runs more smoothly.

Preferably, each single pipe 51 of the present invention is provided with a sealing butterfly valve 54, an electromagnetic flow meter 53 and a pressure reducing valve 52; the electromagnetic flow meter 53 is arranged, so that an operator can conveniently monitor the flow of the split cooling liquid, and the opening of each valve can be conveniently controlled according to needs to realize the control of the split flow; the arrangement of the sealing butterfly valve 54 is convenient for controlling the on-off of each single pipe 51, and can be used for conveniently pressurizing and debugging in a segmented mode during the assembly of the shunting system in the follow-up process; in addition, as a greater optimization, in the present invention, two sealing butterfly valves 54 are provided on each of the single pipes 51, and the electromagnetic flow meter 53 and the pressure reducing valve 52 are provided on a region between the two sealing butterfly valves 54; here, two sealing butterfly valves 54 are provided, so that online replacement of the flow meter 53 and the pressure reducing valve 52 can be achieved.

Preferably, the joints of the first pipeline 3 and the cooling wall water inlet pipeline 1 and the joints of the second pipeline 4 and the degassing tank water return pipeline 2 are welded on the inner side and the outer side; such welding mode can make things convenient for first pipeline 3 to be connected with degasification jar return water pipe 2 with stave inlet channel 1 and second pipeline 4, guarantees the intensity of junction to guarantee the stability that the reposition of redundant personnel system arranged.

The specific operation mode is as follows:

in order to ensure the safe operation of a blast furnace cooling wall water system and prevent the influence on online production caused by the installation of a newly added shunt system, firstly, short pipes with flanges are respectively welded on horizontal pipes at the front sections of a soft water closed system cooling wall water inlet pipeline 1 and a degassing tank water return pipeline 2, namely a first pipeline 3 and a second pipeline 4, the key points of the short pipes are that the short pipes and a main pipe are welded by adopting inner and outer double-sided welding, a first gate valve 31 is installed on the first pipeline 3, a second gate valve 41 is installed on the second pipeline 4, and a pressurizing test is carried out to ensure that the newly added pipe system is normally sealed.

Meanwhile, a pneumatic ball valve 7 is also arranged on the second pipeline 4, the pneumatic ball valve 7 is a newly-added system security valve, is a pneumatic control system, is linked with a main motor of a water supply pump of a blast furnace soft water pump room, and can quickly cut off the connection between the newly-added system and a pipe network; when 1 of the main water supply motors of the pump room loses power, the control system closes the pneumatic ball valve 7 according to the abnormal water supply of the blast furnace, so that the whole shunt system pipe network is closed, the control system can use a conventional control system, the control system belongs to the known technology, and the detailed description is omitted; for example, the control system includes a detection module, the detection module is connected with a control module, the control module is connected with an execution module, the detection module can be a flow sensor or other detection components, the control module can be a controller or a traditional computer terminal and is used for receiving signals and making a judgment, and the execution module can be the pneumatic ball valve 7; the control module can control the pneumatic ball valve 7 to close and open as required.

Meanwhile, the shunt system disclosed by the utility model needs to be checked during installation; the specific examination contents are as follows:

newly adding a pipe system, pressurizing and leak testing, wherein the pressurizing pressure is 1.6MPa, and the pressure maintaining time is 120 min;

the pneumatic ball valve 7 is debugged, the action is flexible and accurate, and all manual butterfly valves 54 are flexible to act;

and simultaneously, acid cleaning is needed for the corresponding newly added valve group and pipeline.

The cooling wall directly supplies soft water for diversion:

before debugging, all newly-added piping valve sets are confirmed to be in a closed state, and before direct cold water on the cooling wall of the furnace body is confirmed to be diverted, the pressure and flow values of the soft water closed system are accurate.

Blast furnace soft water closed system cooling wall direct cooling section split flow water regulating operation

Step one, opening a second gate valve 41 on the second pipeline 4 and a valve seat on the first pipeline 3, and simultaneously opening a pneumatic ball valve 7;

and secondly, opening a butterfly valve 54 on one monomer pipeline 51, opening the butterfly valve 54 on the monomer pipeline 51 and opening the butterfly valve 54 close to one side of the first pipeline 3, opening the butterfly valve 54 close to one side of the second pipeline 4, after two butterfly valves 54 on one monomer pipeline 51 are opened, observing whether the pressure reduction of a pressure reducing valve 52 on the monomer pipeline 51 is normal (the total back pressure is 0.21MPa), after the pressure reduction is normal, regulating and controlling the butterfly valves 54 on other monomer pipelines 51 according to the process requirement of the flow splitting water quantity (50-100 m3/h), and after the flow meter count reaches the required flow splitting water quantity, disabling each manual butterfly valve 54 and marking.

Thirdly, observing other water systems: the flow and pressure of the furnace bottom water cooling pipe and the coiled pipe cooling wall are changed; the water volume and the pressure change of the hot blast stove and the tuyere of the secondary pressurization system; and after the abnormality does not exist, if all the parameters are abnormal, the access of the shunting system is finished, and the shunting system can work normally.

Obviously the specific implementation of the present invention is not limited by the above-mentioned manner, and various insubstantial improvements made by the method concept and technical solution of the present invention are all within the protection scope of the present invention.

Claims (7)

1. A cooling water diversion system for a straight cooling section of a cooling wall of a blast furnace is characterized by comprising a first pipeline and a second pipeline; the first pipeline is connected with the second pipeline through a branch pipeline; the first pipeline is connected to the water inlet pipeline of the cooling wall; and the second pipeline is connected to a water return pipeline of the degassing tank.

2. The cooling water diversion system for the straight cooling section of the cooling wall of the blast furnace as claimed in claim 1, wherein a first gate valve is provided on the first pipeline; a second gate valve is arranged on the second pipeline; and a pneumatic ball valve is also arranged on the second pipeline.

3. The blast furnace stave straight cold section cooling water diversion system of claim 1 wherein said branch conduit comprises a plurality of individual conduits, each of said individual conduits being spaced apart.

4. The blast furnace stave straight cold section cooling water diversion system of claim 3 wherein said first and second pipes are connected to branch pipe ends by connecting water drums, respectively; the end parts of the monomer pipelines are connected through a connecting water drum.

5. The cooling water diversion system of the straight cold section of the cooling wall of the blast furnace as claimed in claim 3, wherein each of said single pipes is provided with a sealing butterfly valve, an electromagnetic flow meter and a pressure reducing valve.

6. The system according to claim 5, wherein two sealing butterfly valves are provided on each single pipe, and the electromagnetic flow meter and the pressure reducing valve are provided on a region between the two sealing butterfly valves.

7. The blast furnace stave straight cold section cooling water diversion system of claim 1 wherein the first pipe and stave water inlet pipe and the second pipe and deaerator tank water return pipe are joined by inside and outside double-sided welding.

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